25results about How to "Guaranteed toughness" patented technology

The application discloses a kind of production and cultivation methods of crisp chicken, comprising the following steps: S1, cultivate crisp chicken species: with E'mei black chicken as basic population, hybridization breeding is obtained with sasso chicken, and hybridization is obtained with Rongde small black chicken, and the crisp chicken species with chicken skin thickness not less than 2.3mm is selected and bred;S2, nutrition regulation feeding is carried out: the nutrition regulation feeding of at least 50 days is carried out to the crisp chicken species in fattening period, and the feed with the crude protein content of 18%-22% is provided, and the feed includes soybean meal, vitamin C, fat, fat metabolism aid, fermented soybean meal and trace nutrients;S3, breeding environment management is carried out: in fattening period, control chicken house environment temperature is 18-25 DEG C, relative humidity is 50%-60%, and breeding density is controlled.The application is cultivated by three system matching breeding, accurate nutrition regulation and fine breeding management multi-link cooperation, and the chicken species that fits crisp core characteristic is cultivated.

A CVT steel belt system belongs to the technical field of CVT transmissions and comprises a plurality of first chain pieces and a plurality of second chain pieces distributed among the first chain pieces at equal intervals, the two sides of the first chain pieces and the two sides of the second chain pieces are provided with highly-asymmetric saddles respectively, and the two sides of the first chain pieces and the two sides of the second chain pieces are connected in series through first steel ring modules and second steel ring modules respectively. Limiting structures used for restraining the first steel ring module or the second steel ring module are arranged on the two sides of the second chain piece, the first steel ring module and the second steel ring module are matched with the corresponding saddles and each comprise a plurality of steel rings which are stacked up and down, and the steel rings which are stacked up and down form a strength and toughness gradual change structure. Two pushing piece structures with asymmetric saddle heights are designed, lateral limiting of the steel ring module can be achieved, steel rings of different layers can be reasonably arranged, the design redundancy is reduced, meanwhile, the strength and toughness of the steel rings are reasonably optimized, and by means of the steel ring combination mode with the strength gradually changed from bottom to top, the stability of the steel ring module is improved. And the use performance of the steel belt system is improved.

The application belongs to the technical field of engineering plastics, and particularly relates to the field of ultrasonic welding PET compositions, and discloses a PET resin composition which comprises the following components: 60-75 parts of PET resin, 5-15 parts of PETG resin, 2-5 parts of a toughening agent, 18-25 parts of glass fiber, and 0.2-0.8 parts of a nucleating agent. The application provides a PET composition with high ultrasonic welding strength, so that the integrity and overall strength of a PET product after ultrasonic welding are improved, and the cracking and separation of the welding position can be effectively avoided. The PET resin composition of the application is applied to a PET resin material product which needs to be ultrasonically welded, and the related product prepared by the PET resin composition has excellent ultrasonic welding strength and excellent mechanical properties.

The application belongs to the technical field of thermoplastic elastomer modification, and discloses a silane coupling agent modified thermoplastic elastomer and a preparation method thereof, and aims to solve the technical defects of the existing thermoplastic elastomer, such as uncoordinated strength and toughness, poor temperature change resistance, insufficient ultraviolet stability, and poor comprehensive performance coordination. The modified thermoplastic elastomer is prepared by compounding a thermoplastic elastomer base material, a silane coupling agent modification liquid, a boron nitride-kaolin combined agent and other auxiliary agents according to specific weight parts. The preparation process of the application is simple and controllable, the obtained modified thermoplastic elastomer has balanced strength and toughness, a wide temperature change resistance range, excellent ultraviolet stability and outstanding comprehensive performance.

The invention provides a metal-based ceramic composite wear-resistant material and a preparation process thereof, and belongs to the technical field of metal-based ceramic materials. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of a ceramic particle through two-stage coating of the ceramic particle and low-temperature ultrasonic relaxation cooperative treatment, then mixing with metal matrix powder, molding and sintering, and finally, carrying out ultrasonic relaxation treatment at 15-25 DEG C. The preparation method comprises the following steps: firstly, forming a carboxylated carbon nanotube flexible layer and a metal Ti reinforced layer on the surface of the ceramic particle; according to the process, low-temperature aging micro-crack initiation is effectively inhibited, the number of micro-cracks is only 1.8 / mm < 2 > after the material is aged for 1000 h at the temperature of-10 DEG C, the interface bonding strength reaches 256.7 MPa, the wear resistance attenuation rate is only 9.9%, and the material can be stably adapted to mining machinery scenes in alpine regions.

The application discloses additive manufacturing 5-series aluminum alloy powder material containing Ce and Yb elements and a preparation method thereof, and comprises the following steps: preparing a mixed material by weighing raw materials according to component proportions, and preparing Al-Mg-Sc-Yb-Ce-Mn-Si pre-alloy powder through vacuum melting and argon atomization, wherein the raw materials are as follows in terms of mass fraction: Mg: 4-12%, Sc: 0.6-0.8%, Zr: 0.1-0.8%, Mn: 0.2-0.5%, Si: 0.3-1.0%, Yb: 0.03-0.8%, Ce: 0.03-0.8%, and the rest is Al and other impurities. The application adds a certain amount of rare earth elements (Yb and Ce) and Mn and Si elements in the traditional AlMgScZr alloy powder, forms a second phase with alloy elements, plays a role in refining grains and improving crack resistance as a refining agent, controls the process, obtains powder with a certain particle size range through airflow screening, carries out additive manufacturing according to a certain process window, and through heat treatment, the strength of the additive manufacturing high-strength and high-toughness aluminum alloy is improved to 550 MPa level while maintaining high plasticity and toughness.

The utility model relates to the technical field of uvioresistant fabrics, and discloses an uvioresistant fabric which comprises a fabric, a protection mechanism is arranged on the inner wall of the fabric and used for protecting ultraviolet rays, a tensile mechanism is arranged on the inner wall of the protection mechanism and used for enhancing the tensile property of the fabric, and the fabric is arranged on the inner wall of the protection mechanism. The protection mechanism comprises an anti-ultraviolet coating, the outer wall of the anti-ultraviolet coating is fixed to the top of the inner wall of the cloth, the bottom of the anti-ultraviolet coating is fixedly connected with an anti-ultraviolet assembly, the bottom of the anti-ultraviolet assembly is fixedly connected with a filtering assembly, and the bottom of the filtering assembly is fixedly connected with a breathable assembly. The top of the outer wall of the ventilation assembly is fixedly connected with a water absorption assembly. According to the anti-ultraviolet fabric, the first anti-ultraviolet layer is fixed at the top of the inner wall of the fabric, and the water absorption of the fabric can be ensured by forming the plurality of water absorption holes in the outer wall of the fabric, so that the use requirements are met.

The utility model relates to the field of rasping machines, and discloses a novel rasping machine saw blade which comprises a saw blade seat installed on a rasping machine, a saw blade body is installed on the saw blade seat through a detachable structure, saw teeth are arranged at the bottom of the saw blade body, and the saw teeth are arranged to be variable in tooth pitch. A wear-resistant coating is arranged on the surface of the saw blade body, a plurality of heat dissipation grooves are formed in the saw blade body in the length direction, and the heat dissipation grooves are in a wave shape. A mounting hole is formed in the saw blade seat, a mounting rod is mounted on the inner wall of the rear side of the mounting hole, a mounting hole matched with the mounting rod is formed in the saw blade body, the tooth pitches of the saw teeth are sequentially increased from left to right, and the tooth pitches of the saw teeth are sequentially increased from 8 mm to 12 mm from left to right. The saw blade has the following advantages and effects that efficient and accurate saw cutting, good heat dissipation, wear resistance, durability and convenient disassembly and assembly are achieved through the variable-tooth-pitch sawteeth, the wavy heat dissipation grooves, the wear-resistant coating and the convenient detachable structure, and the machining quality and efficiency are improved.

The present application relates to the technical field of condom production, in particular to a natural latex rubber condom production method; S1: all used raw materials are inspected, and raw latex is prepared and its performance is tested, and the qualified product of raw latex is obtained after testing; S2: solution preparation; S3: preparation of vulcanized latex; S4: vulcanized latex ripening, storage and filtration; S5: sent to a condom linkage machine production line; after mold washing treatment is completed, latex dipping treatment is entered, after the latex dipping treatment is completed, demolding is performed to obtain a semi-finished product; after the condom demolding is completed, a finished product post-treatment process is entered; after the semi-finished product bubble isolation agent is completed, a final drying process is entered; after drying, a condom finished product is obtained. The process method can effectively ensure the uniformity of dipping and the forming effect in the production process of the condom, ensure the toughness and overall tensile strength of the obtained condom product, and improve the use performance of the product.

The application discloses a torsion bar shaft, a lightweight anti-rolling torsion bar and a metal pipe hole processing technology. The torsion bar shaft comprises a metal pipe and a fiber layer which is bonded to the outer periphery of the metal pipe. The lightweight anti-rolling torsion bar comprising the torsion bar shaft further comprises torsion arms at both ends of the torsion bar shaft and an end connecting body. The torsion arms are formed by extending and bending the metal pipe of the torsion bar shaft. The end connecting body comprises a swing arm connecting part and a pull rod connecting part. The swing arm connecting part is connected with the end of the torsion arm, and the pull rod connecting part is connected with the pull rod. The metal pipe hole processing technology comprises the following steps: S1, performing cylindrical processing on a rod to be processed; S2, clamping the rod by reversing the direction, and drilling a hole one and a hole two which are communicated from the A end and the B end of the rod respectively; and S3, positioning and clamping the rod with the axis line one and the axis line two as the pipe hole axis lines, and performing turning on the outer periphery of the rod to make the wall thickness uniform.

The application belongs to the technical field of paint, and particularly relates to high stone impact resistance and free grinding water-based intermediate coating for buses, and a preparation method and application thereof. The high stone impact resistance and free grinding water-based intermediate coating is combined by component A resin paint and component B curing agent according to a weight ratio of 5:1. The component A resin paint comprises the following components: hydroxyl acrylic resin, deionized water, dispersing agent, anti-settling agent, defoaming agent, leveling agent, wetting agent, titanium white powder, talcum powder, flatting powder, thickening agent and solvent A. The component B curing agent comprises the following components: curing agent and solvent B. Compared with the prior art, the application solves the problem that the intermediate coating of the automobile coating in the prior art still needs to be polished during the construction process, thereby leading to complex steps and dependence on the experience of workers. The intermediate coating of the scheme has excellent performance and realizes free polishing operation during the construction process.

The application relates to the technical field of fiber reinforced composites, in particular to a prepreg, a preparation method thereof and a fiber reinforced composite. The prepreg comprises a reinforcing material and a resin composition attached to the reinforcing material; the reinforcing material is carbon fiber; the resin composition comprises the following components in parts by weight: 100 parts of an epoxy resin, 0.1-10 parts of an epoxy-containing diluent, 1-12.5 parts of a tackifier, 4-10 parts of a curing agent, and 1-5 parts of an accelerator; the epoxy resin comprises one or more of bisphenol A type epoxy resin, multifunctional epoxy resin and phenolic epoxy resin, and the epoxy equivalent weight of the bisphenol A type epoxy resin and the phenolic epoxy resin is independently 155 g / eq-220 g / eq. The prepreg has good quality consistency, and can effectively improve the mechanical properties of the fiber reinforced composite.

The invention relates to the technical field of ferrous metallurgical equipment maintenance and welding repair, and discloses a steel billet hydraulic shear cobalt-based alloy blade repair method which comprises the steps that S1, pretreatment is conducted, low-pressure sand blasting cleaning is conducted, a failure layer is removed, and a carburized layer of 0.05-0.2 mm on the groove wall is polished and removed; s2, a Co-Cr-W-C cobalt-based welding wire with a certain proportion is selected and used; s3, surfacing welding is conducted, specifically, a cutting edge is preheated to 280-320 DEG C, the temperature of a tool apron is strictly controlled to be not higher than 180 DEG C, multi-layer and multi-pass surfacing welding is conducted through a TIG welding machine, and stress relief annealing is conducted at the temperature of 560-600 DEG C after surfacing welding; and S4, machining and grinding to recover the geometric dimension. According to the method, through carburized layer removal, gradient temperature control and a special heat treatment system, the problems that cracks and air holes are prone to being generated in cobalt-based alloy welding and a tool apron base body is softened and deformed due to overheating are effectively solved, the metallurgical bonding strength, high-temperature abrasion resistance and thermal fatigue resistance life of a repaired blade are improved, and the service cycle of equipment is prolonged to a large extent.

The invention provides a control method and device for secondary chemical strengthening of cover plate glass and a program product. The method comprises the following steps: determining process parameters of secondary strengthening according to a sodium ion coupling diffusion equation; and performing primary chemical strengthening and secondary chemical strengthening on the cover plate glass according to the process parameters. According to the control method for secondary chemical strengthening of the cover plate glass provided by the invention, the problem that the surface potassium ion concentration after secondary strengthening cannot be accurately predicted and controlled at present is fundamentally solved by introducing a sodium-potassium ion coupling diffusion equation. And moreover, traditional experience trial and error are replaced by accurate calculation based on a physical model, and the relative error between the predicted concentration of the model and a measured value is reduced, so that accurate prediction and regulation of the concentration are realized, and the yield of the cover plate glass is remarkably improved.

A low-cost Q690D steel plate and its online quenching-tempering production method belong to the field of steel heat treatment technology. Its chemical composition and mass content are: C 0.14-0.17%, Si 0.25-0.35%, Mn 1.35-1.55%, P≤0.01%, S≤0.005%, Cr 0.30-0.50%, Nb 0.020-0.035%, Ti 0.015-0.025%, V 0.02-0.04%, B 0.0015-0.0025%, with the remainder being iron and unavoidable impurities. The production method includes controlled rolling, online quenching, and tempering processes. This invention does not add precious metal elements such as Ni, Mo, and Cu, resulting in low alloy cost, short process time, and a steel plate with a yield strength ≥690MPa and an impact energy ≥120J at -20℃, exhibiting good strength and toughness matching.

This application relates to a wire rod, an arc-sprayed wire, and a preparation method thereof, belonging to the technical field of arc-sprayed materials. The chemical composition of the wire rod, by mass fraction, is: C: 0.08%~0.14%, Si: 0.10%~0.60%, Mn: 1.50%~2.00%, P≤0.020%, S≤0.020%, Cr≤0.10%, Ni≤0.10%, Mo≤0.05%, Cu≤0.10%, Ti≤0.010%, Al≤0.020%, N≤0.010%, TO≤0.010%, with the remainder being Fe and unavoidable impurities. The wire is prepared by optimizing the chemical composition of the alloy wire rod through processes such as smelting, continuous casting, rolling, surface treatment, rough drawing, copper plating, and fine drawing. The mass fraction of Cu is 0.10%~0.25%, and the other elements are the same as those in the wire rod. This wire material has excellent wear and corrosion resistance and adhesion strength to the aluminum alloy substrate. It can form a stable protective coating on the inner wall of the engine cylinder, taking into account both the advantages of engine lightweighting and high performance requirements, and effectively supporting long-term service.

The invention provides heat treatment equipment and method for steel for a high-speed train brake disc, and relates to the technical field of electric heating furnaces. The heat treatment equipment comprises a supporting seat, a heating bin is installed at the upper end of the supporting seat, an electric heating unit is arranged in the heating bin, a heating chamber is formed in the side face of the heating bin, and a bin door can block a port of the heating chamber; a placing unit is arranged in the heating chamber, a brake disc round blank steel disc to be subjected to heat treatment heating can be placed on the placing unit to be subjected to rotary heating, and a clamped and fixed brake disc steel billet is driven to rotate at a constant speed in the heating chamber through the pneumatically driven placing unit, so that the steel billet is uniformly heated at all positions in the circumferential direction and the radial direction; the defects of large local temperature difference and non-uniform metallographic structure of the brake disc steel billet in the existing fixed placement type heat treatment furnace are overcome, the consistency of key mechanical properties such as hardness, toughness, wear resistance and thermal fatigue resistance of the steel billet is ensured, and the harsh working condition requirements of heavy load and high-frequency braking of the brake disc of a high-speed train are completely met.

This utility model discloses a bipolar plate for a flow battery with a conductive metal sheet, comprising a front electrode plate, an intermediate substrate, and a rear electrode plate. The front electrode plate is a conductive plastic sheet, the intermediate substrate is a metal sheet, and the rear electrode plate is also a conductive plastic sheet. The intermediate substrate is composite-extruded between the front and rear electrode plates. By forming the front, intermediate, and rear electrode plates into a composite bipolar plate, the conductivity of the bipolar plate can be increased through the intermediate substrate. Simultaneously, using a metal sheet for the intermediate substrate effectively ensures the strength and toughness of the bipolar plate, preventing brittleness and leakage. Since the front and rear electrode plates are made of plastic, the weight is reduced. This material combination provides a bipolar plate with better conductivity, lower porosity, and lower cost. Furthermore, the composite extrusion method simplifies the manufacturing process and makes it easy to implement.

The utility model provides a grease-proof corrugated board suitable for cold-chain logistics, which sequentially comprises a grease-proof coating, a low-temperature-resistant PLA (polylactic acid) lamination layer, a wavy buffer layer, a rebound filling layer, a degradable PE (polyethylene) preservative film layer, an oil-resistant coating, a honeycomb board layer, an oleophobic activated carbon non-woven fabric layer and a high-density corrugated paper inner layer from outside to inside, and the rebound filling layer is correspondingly arranged in a corrugated gap of the wavy buffer layer in a filling manner. High low temperature resistance and grease permeation resistance are realized.

The invention discloses a production method of a rolled composite plate for coal chemical industry. The rolled composite plate with the thickness of 10-70 mm and the width of 1500-3000 mm is produced, and base layer steel comprises the following chemical components in percentage by weight: 0.12-0.16% of C, 0.50-0.60% of Si, 0.40-0.65% of Mn, less than or equal to 0.007% of P, less than or equal to 0.003% of S, 0.020-0.045% of Alt, 1.15-1.50% of Cr, 0.50-0.65% of Mo and 0.12-0.16% of Ni; the cladding stainless steel comprises the following chemical components in percentage by weight: less than or equal to 0.08% of C, less than or equal to 1.00% of Si, less than or equal to 1.00% of Mn, less than or equal to 0.035% of P, less than or equal to 0.015% of S, less than or equal to 0.60% of Ni and 11.5- The process route comprises the steps of blank welding compounding, vacuumizing, controlled rolling and quenched-tempered heat treatment. The bonding rate of the produced composite board reaches 100%, the surface quality of a coating is good, the yield strength at the 1 / 2 thickness position is larger than or equal to 310 MPa, the tensile strength is 520-680 MPa, the impact absorption energy at the temperature of-20 DEG C is larger than or equal to 200 J, the shear strength is larger than or equal to 300 MPa, and the intergranular corrosion rate is 0 under the inspection supply state and the simulation postweld heat treatment state.

The application relates to the technical field of gelatin, and discloses a constant-temperature and constant-speed gelatin mixing modification process special for hard gelatin capsules, in which, through a Michael addition reaction, covalent bond combination of modified gradient porous aerogel and gelatin is realized, uniform dispersion of the aerogel in the gelatin matrix is ensured from a molecular level, and the problems of interface compatibility between inorganic aerogel and organic gelatin which have long plagued the industry are solved. The modified aerogel has excellent water retention performance, can effectively solve the problems that the existing gelatin hard gelatin capsules become brittle and affect transportation and long-term storage of medicines under long-term dry environment, and can be uniformly distributed in the matrix as high-efficiency stress transmission nodes due to the special gradient porous structure, so that the mechanical strength of the gelatin hard gelatin capsules is obviously improved, capsule cracking is inhibited, and the transportation damage rate is greatly reduced.

The invention relates to the technical field of laser cladding, in particular to a laser cladding tungsten-based composite material in-situ repairing method for tungsten cathode defects. The invention discloses a laser cladding tungsten-based composite material in-situ repairing method for tungsten cathode defects. The method comprises the following steps: firstly, pretreating a defect part to thoroughly remove a corrosion layer; then laser cladding is carried out in two steps, wherein the size is recovered through a recovery layer of the palladium-titanium carbide reinforced tungsten-based composite material, and the obdurability and compactness are guaranteed; and then the functional surface layer of the yttrium-zirconium doped tungsten alloy is used as a functional surface layer to improve the high-temperature oxidation resistance, metallurgical bonding of the repairing layer and the base body is achieved through the method, and the repairing body has the characteristics of high temperature resistance and high strength.

The telescopic rods and the awning device with the telescopic rods are simple in structure and capable of improving riding safety, the awning device comprises awning cloth and two telescopic rods arranged at the front end of a two-wheeled vehicle, the telescopic rods are symmetrically arranged, each telescopic rod comprises a first fixing pipe, a first drawing pipe is arranged on each first fixing pipe in a drawing mode, and a second drawing pipe is arranged on each first fixing pipe in a drawing mode. The first drawing pipes are drawn out and then clamped and limited with the ends of the first fixing pipes, a hanging rod is arranged between the first drawing pipes, the front section of the awning cloth is fixedly arranged on the hanging rod through a fixing device, and first elastic rods are arranged on the first drawing pipes in a penetrating mode. A first limiting device for preventing the first elastic rod from sliding out of the first drawing pipe is arranged between the first drawing pipe and the first elastic rod, the other end of the first elastic rod is slidably sleeved with a second fixing pipe, and a second limiting device is arranged between the second fixing pipe and the first elastic rod. And the middle section part of the awning cloth is connected with the second fixed pipe through a connecting device.

The application discloses a frequency-adjusting quenching device of a screwdriver, relates to the technical field of quenching equipment, and aims to solve the problem of low toughness of the corner position of the existing mobile quenching device and easy corner cracking in the prior art, and comprises a quenching box, a frequency-adjusting device, a motor, a conductive circuit, a moving assembly one, an inductor one, an inductor two and a frequency-adjusting module. The application further discloses a use method of the frequency-adjusting quenching device of the screwdriver, which comprises the following steps: S02, fixing a workpiece to be processed by using a three-jaw chuck; S04, starting the moving assembly one to make the workpiece to be processed move in the inductive coil relative to the inductive coil; S06, the inductor one sends a signal one comprising position information of the workpiece to be processed, and the inductor two sends a signal two comprising moving speed information of the workpiece to be processed relative to the inductive coil; S08, a controller receives the signal one and the signal two to adjust a heating frequency; and S10, starting a cooling device to control a flowable medium to cool the workpiece to be processed.

The utility model relates to the technical field of projectors, and discloses a modularized detachable display assembly multi-scene intelligent projector, which comprises an independent display assembly and a projector host, the projector host is composed of a heat dissipation assembly, a projection tube, a reflector, a remote controller receiver and a projection lens, the inner side of the projector host is connected with the projection tube, and the projection tube is connected with the reflector. A reflector is connected to one end, close to the projection tube, of the inner side of the projector host, and a heat dissipation assembly is connected to the top end of the projector host. An independent display assembly is independent and can be conveniently disassembled and replaced, the whole component is divided into the LCD display screen, the heat insulation glass with the polaroid and the display screen support, the display screen and the heat insulation glass can be assembled at the same time, the characteristic assembling precision is high, the structure is compact, stability is high, the display screen is prevented from being pressed or broken, and the cost is low. Meanwhile, assembly is simple, ABS + 30% GF is selected for projector injection molding, and therefore the structural strength is guaranteed, and the structural precision, toughness and heat resistance are guaranteed.